Gilera 633721 Workshop Manual page 172

Engine
Specification
- Check that the driving shaft cone, the tab seat, the oil seal capacity, the toothed gear and the threaded
tangs are in good working order.
- In case of failures, replace the crankshaft.
N.B.
MAIN BEARINGS CANNOT BE MODIFIED.
The connecting rod cannot be replaced. To check the connecting rod small end diameter, see chapter
"Thermal group and timing system".
- When cleaning the crankshaft, be careful to prevent any impurity from entering into the shaft lubrication
hole.
N.B.
IN CASE OF REPLACEMENT OF A CRANKSHAFT CONSISTING OF TWO HALF-SHAFTS OF DIF-
FERENT CATEGORY, REPLACE THE TWO HALF-CRANKCASES AS WELL, COUPLING THE TWO
COMPONENTS (SHAFT AND CRANKCASE) WITH THE SAME CATEGORY.
- To check the gearing of the crankshaft, see sec-
tion "Thermal group and timing system".
See also
Cylinder assy. and timing system
ENG - 172
MAX ADMISSIBLE DISPLACEMENT:
A
B
C
D
Nexus 500 euro 3
Desc./Quantity
= 0.15 mm
= 0.01 mm
= 0.01 mm
= 0.10 mm